接触问题

Furthermore, According to the computing characteristics of explicit type of finite element method and contact-impact problems, a contact balance bisection algorithm for domain decomposition is designed and implemented.

根据显式有限元和冲击－接触问题的计算特点，设计并实现了接触均衡的分区算法。

A damping simplification method is proposed which keeps the high accuracy of the dynamic contact force method.

动接触力算法是求解粘弹性动接触问题的精度较高的方法之一。

Since two curves have the same coordinates and unit normal vector at the contacting point, the problem of the mesh of two planar curves is transformed into an ordinary differential equation by vector analysis. We have the solution to the equation by numerical method and computer calculation. After repeating the way of computing the solution to the equation, we have the contacting points.

因两曲线於接触点的位置相同，单位法线向量相等，由向量分析使曲线接触问题转变为常微分方程式，藉助数值计算与电脑运算得到方程式解，重覆计算方程式的解即可得每一接触点的位置。

In Chapter 5, we study three dimensional elasto-plastic frictional contact problems with orthotropic friction law. Parametric variational principle and parametric quadratic programming method are applied to analyze this class of complicated mechanics problems. A linear complementarity problem formulation is derived.

在第五章，我们采用正交各向异性摩擦定律模型对三维弹塑性摩擦接触问题进行分析，将正交各向异性的摩擦定律线性化后，将参变量变分原理和参数二次规划法应用到这一复杂的力学问题中来，最终将问题化为线性互补问题模型。

Based on researching contact Finite Element Analysis theory, a contact analysis prick valve pressurize through ANSYS is achieved.

介绍了液压领域里常用锥阀密封结构的接触密封机理，通过研究接触问题的非线性有限元理论，运用大型有限元软件ANSYS对锥阀密封结构进行了静态接触分析。

The analysis of the contact problem in FEM includes two aspects: the checking of contact points and the treatment of contact points with mechanics and kinematics.

有限元分析中的接触问题包括两方面：接触点的检测和已接触点的力学与运动学处理。

For dovetail joint,the problem of elastic contact is solved using the finite element method.

针对燕尾榫连接结构，采用有限元技术求解接触问题，获得结构接触应力及接触状态量的分布，并预测裂纹萌生的位置。

The contact problem between the infinite semicircle cylinder and the plane is a typical example in the field of contact problem research. The solutions obtained through static model are compared with the Hertzian solutions in this paper.

以无限长半圆柱与水平面间的接触问题为算例，本文将静力学计算结果与经典Hertz接触理论解比较，获得了良好的一致；在动力学方面，本文仿真了突然加载下的半圆柱与水平面的接触过程，仿真收敛性良好。

Distribution of contact stress and contact status of dovetail joint are obtained, and the location of fretting fatigue crack predicted.

针对燕尾榫连接结构，采用有限元技术求解接触问题，获得结构接触应力及接触状态量的分布，并预测裂纹萌生的位置。

First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in UG software. The elastic contact problem is analyzed in finite element method and is used to the parameters' distribution and contact stress of the joint are obtained on the base of ANSYS code. With the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high/low cycle complex load is proposed. The proposed model and the approach were verified by experiments.

本文介绍了微动损伤的机理和微动疲劳寿命的研究方法；利用UG软件对燕尾榫联接结构创建了参数化实体模型；基于ANSYS软件平台求解弹性接触问题，获得了榫联接结构接触应力及接触状态量的分布；在已有微动疲劳寿命预测模型的基础上，引入载荷频率影响因子，对低周、高低周复合载荷作用下的燕尾榫联接结构进行了微动疲劳寿命的预测，与试验结果对比表明采用本文提出的方法预测榫联接结构的微动疲劳寿命是有效的。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷